You'd probably like David Andree - In Streams if you like Tycho. They're not the same stylistically but they are similar in emotion

Also

Stars of the Lid - The Tired Sounds Of

Venn Rain - Place In World

Aidan Baker - The Taste of Summer On Your Skin

Tim Hecker - Ravedeath, 1972

Brian Eno - Ambient 1: Music For Airports

You should check out more Boards of Canada than just The Campfire Headphase by the way. Not ambient of course, but it's introspective and all, and similar in attitude to some of the ambient we're talking about here